========================================================================== Ubuntu Security Notice USN-5800-1 January 12, 2023
heimdal vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS - Ubuntu 16.04 ESM - Ubuntu 14.04 ESM Summary: Several security issues were fixed in Heimdal. Software Description: - heimdal: Heimdal Kerberos Network Authentication Protocol Details: It was discovered that Heimdal incorrectly handled certain SPNEGO tokens. A remote attacker could possibly use this issue to cause a denial of service. (CVE-2021-44758) Evgeny Legerov discovered that Heimdal incorrectly handled memory when performing certain DES decryption operations. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2022-3437) Greg Hudson discovered that Kerberos PAC implementation used in Heimdal incorrectly handled certain parsing operations. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2022-42898) It was discovered that Heimdal's KDC did not properly handle certain error conditions. A remote attacker could use this issue to cause a denial of service, or possibly execute arbitrary code. (CVE-2022-44640) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS: libasn1-8-heimdal 7.7.0+dfsg-1ubuntu1.3 libgssapi3-heimdal 7.7.0+dfsg-1ubuntu1.3 libhdb9-heimdal 7.7.0+dfsg-1ubuntu1.3 libhx509-5-heimdal 7.7.0+dfsg-1ubuntu1.3 libkrb5-26-heimdal 7.7.0+dfsg-1ubuntu1.3 Ubuntu 18.04 LTS: libasn1-8-heimdal 7.5.0+dfsg-1ubuntu0.3 libgssapi3-heimdal 7.5.0+dfsg-1ubuntu0.3 libhdb9-heimdal 7.5.0+dfsg-1ubuntu0.3 libhx509-5-heimdal 7.5.0+dfsg-1ubuntu0.3 libkrb5-26-heimdal 7.5.0+dfsg-1ubuntu0.3 Ubuntu 16.04 ESM: libasn1-8-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 libgssapi3-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 libhdb9-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 libhx509-5-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 libkrb5-26-heimdal 1.7~git20150920+dfsg-4ubuntu1.16.04.1+esm3 Ubuntu 14.04 ESM: libasn1-8-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm3 libgssapi3-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm3 libhdb9-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm3 libhx509-5-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm3 libkrb5-26-heimdal 1.6~git20131207+dfsg-1ubuntu1.2+esm3 After a standard system update you need to restart any application using Heimdal libraries to make all the necessary changes. References: https://ubuntu.com/security/notices/USN-5800-1 CVE-2021-44758, CVE-2022-3437, CVE-2022-42898, CVE-2022-44640 Package Information: https://launchpad.net/ubuntu/+source/heimdal/7.7.0+dfsg-1ubuntu1.3 https://launchpad.net/ubuntu/+source/heimdal/7.5.0+dfsg-1ubuntu0.3
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